Title d and f-Block.pdf ✅

1 JEE Advanced (2024) d and f-Block CHEMISTRY Only One Option Correct Type Question (1-7) 1. Which of the following combination will produce H2 gas? [Chemical reaction] (A) Fe metal and conc. HNO3 (B) Cu metal and conc. HNO3 (C) Au metal and NaCN(aq) in the presence of air (D) Zn metal and NaOH(aq) 2. Which of the following will not be oxidized by O3? [Chemical reaction] (A) KI (B) FeSO4 (C) KMnO4 (D) K2MnO4 3. Which of the following arrangements does not represent the correct order of the property stated against it? [Properties] (A) Co3+ < Fe3+ < Cr3+ < Sc3+: stability in aqueous solution (B) Sc < Ti < Cr < Mn: number of oxidation states (C) V2+ < Cr2+ < Mn2+ < Fe2+: paramagnetic behaviour (D) Ni2+ < Co2+ < Fe2+ < Mn2+: ionic size 4. A 2 4 2 4 (Orange) (Orange red) Na CrO Na SO B C NaCl → + → + A, B and C respectively are: [Chemical reaction] (A) K2SO4, KCrO4 and K2Cr2O7 (B) K2SO4, Na2CrO4 and Na2Cr2O7 (C) H2SO4, NaCrO2 and K2Cr2O7 (D) H2SO4, Na2Cr2O7 and K2Cr2O7 5. Select correct matching: [Ores] Ore Metal (A) Monazite : Thorium (B) Pitch blende : Uranium (C) Sphalerite : Zinc (D) All of the above are correct 6. A, B and C respectively are: (A) HNO3, AgNO3, AgNO2 (B) NaNO2, AgNO2, Ag2NO (C) NaNO2, AgNO3, AgNO2 (D) HNO3, AgNO2, Ag2O+N2 7. Spitting of a silver refers to [Spitting of silver] (A) Silver leaves are used in Ayurvedic and Yunani medicines (B) Silver an amalgam is used for filling teeth (C) The air contaminated with H2S tarnishes silver due to formation of Ag2S (D) On heating the molten mass of silver absorbs oxygen which is again released on cooling One Or More Than One Correct Type Question (8-12) 8. Which of the following statement(s) is/are correctly explain(s) the existence of Mn2O7 but non-existence of MnF7? [Bonding] (A) Ability of oxygen to stabilise high oxidation states exceeds that of fluorine. (B) Ability of oxygen to form pπ-pπ multiple bonds to metals. (C) Vacant 3d-orbitals of Mn overlap with 2p- orbitals of oxygen. (D) Filled 3p-orbitals of Mn overlap with 2p- orbitals of oxygen. 9. Chromium is extensively used in electroplating industry. Oxidation of Cr to Cr2+ ion involves removal of valence electrons from: [Oxidation state] (A) 3d orbital (B) 4s orbital (C) 4s and 4p orbital (D) 3d orbital only Practice Sheet
2 10. Although +3 is the characteristic oxidation state for lanthanoids but cerium also shows +4 oxidation state because [oxidation state] (A) it has variable ionisation enthalpy (B) it has a tendency to attain noble gas configuration (C) it has a tendency to attain f0 configuration (D) it resembles Pb4+ 11. Which of the following statements are correct regarding silver halides. [Solubility] (A) All silver halides except AgF are insoluble in H2O (B) AgF is soluble in H2O due to large negative hydration enthalpy of F⊖ ions (C) All the silver halides dissolve in thiosulphate and cyanide solution (D) AgBr is used in photographic films as it is very sensitive to light 12. Select the correct statements(s) [Miscellaneous] (A) When FeCl3 solution is added to K4 [Fe(CN)6] solution, in addition to FeIII [FeII (CN)6] – , FeII [FeIII (CN)6 ] – is also formed due to side redox reaction. (B) When FeCl2 solution is added to K3 [Fe(CN)6] solution, in addition to FeII [FeII (CN)6] – FeIII [FeII(CN)6] – is also formed due to side redox reaction. (C) FeIII [FeIII(CN)6] – is paramagnetic while FeII [FeIII (CN)6] – is diamagnetic. (D) FeIII [FeII(CN)6] – is diamagnetic while FeII [FeIII(CN)6] – is paramagnetic. Integer Type Question (13-17) 13. Out of the following, how many of them have magnetic moment value [Magnetic moment] 2 12 BM Mn ,Mn ,Re ,Re ,Te ,Cr,W 2 1 2 1 1 + + + + + 14. Following steps are involved in manufacturing of potassium dichromate: [Chemical reaction] 2 3 Fused with Na CO in the presence of air Chromite ore Solid mass ⎯⎯⎯⎯⎯→ What is difference in the O.N. of Cr between X and Z. 15. [(C2H5)x Al] and TiCl4 form the basis of Zeigler- Natta type heterogeneous catalyst. What is x? [Catalysis] 16. 2 nd and 3rd triads of group 'G' collectively are called platinum metals. G is ..... [Properties] 17. KMnO4 oxidises thiosulphate to 2 SO4 − as per reaction [Chemical reaction] 2 2 4 2 3 2 2 4 xMnO 3 S O H O xMnO 6SO 2OH − − − − + + → + + Find the value of x in above reaction.
3 ANSWER KEY 1. ( D ) 2. ( C ) 3 . (C) 4 . (D) 5 . (D) 6 . (A) 7 . (D) 8 . (A, C) 9 . (A, B) 10 . (B, C) 11 . (A, B, C, D) 1 2 . (A, B, D) 1 3 . (4) 1 4 . (3) 1 5 . (3) 1 6 . (8) 1 7 . (8)